27-02-2017, 09:27 AM
Today we can not deny the use of the refrigeration system in our lives, not only in the kitchen, but also in shops, industries and commercial purposes. The compression refrigeration system today has given a very good performance. But the refrigerants (chlorofluorocarbons, hydro-chlorofluorocarbons) used in these systems are dangerous for the environment and human life, as they react with very useful ozone gas (O3). Therefore, depletion of the ozone layer is the main problem facing us.
The thermoelectric cooling system can replace the vapor compression refrigeration system by the petitioner on a small scale.
The thermoelectric cooling system is based on the principle of thermoelectric effect, first observed by Henrich Lenze in 1938. This effect is based on five different laws,
Seebeck Effect:
"When two unions of a pair of two dissimilar metals maintained at different temperatures, there is generation of e.m.f."
Mr. Seeback conducted a series of tests varying the temperatures of the joints of various combinations of materials. The e.m.f. It was found that the production was:
D E μ D T
D E = μabD T
Where μab = Coefficient of return.
Peltier effect:
"If the direct current passes through a pair of dissimilar metals there is heating in one joint, cooling to another depending on the combinations of materials."
Q μ I
Q = pab. I
Where Q = rate of heating or cooling.
I = current passing through the junction.
P = Peltier coefficient.
The thermoelectric cooling system can replace the vapor compression refrigeration system by the petitioner on a small scale.
The thermoelectric cooling system is based on the principle of thermoelectric effect, first observed by Henrich Lenze in 1938. This effect is based on five different laws,
Seebeck Effect:
"When two unions of a pair of two dissimilar metals maintained at different temperatures, there is generation of e.m.f."
Mr. Seeback conducted a series of tests varying the temperatures of the joints of various combinations of materials. The e.m.f. It was found that the production was:
D E μ D T
D E = μabD T
Where μab = Coefficient of return.
Peltier effect:
"If the direct current passes through a pair of dissimilar metals there is heating in one joint, cooling to another depending on the combinations of materials."
Q μ I
Q = pab. I
Where Q = rate of heating or cooling.
I = current passing through the junction.
P = Peltier coefficient.